Jacob Medina’s Reviews > Logic: A Very Short Introduction > Status Update
Jacob Medina
is on page 3 of 192
“(Logic) is not concerned with whether the premisses of an inference are true or false. That’s someone else’s business. It is interested simply in whether the conclusion follows from the premisses. This is what validity is. The central aim of logic is to understand validity.”
— Aug 30, 2025 11:20AM
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Jacob’s Previous Updates
Jacob Medina
is on page 13 of 192
Modern logic, as the author has orchestrated it, is a lot like math. It has rules for situations and propositions. Similar to algebra.
— Sep 03, 2025 04:33PM
Jacob Medina
is on page 6 of 192
“A deductively valid inference is one for which there is no situation in which all the preferences are true, but the conclusion is not.”
— Aug 30, 2025 11:26AM
Jacob Medina
is on page 4 of 192
Inductive validity: “when a premiss has a good reason for the conclusion but it is not completely conclusive.”
Example: “Storm clouds are gathering; so there will be rain.”
— Aug 30, 2025 11:22AM
Example: “Storm clouds are gathering; so there will be rain.”
Jacob Medina
is on page 3 of 192
Deductive validity: “the premises couldn’t be true without the conclusion also being true.”
— Aug 30, 2025 11:21AM
Jacob Medina
is starting
“Logic is the study of what counts as a good reason for what, and why.”
— Aug 30, 2025 11:16AM
